/Engine/Source/Editor/SceneOutliner/Public/SSceneOutliner.h
Set the selection status of a set of items in the scene outliner
void SetItemSelection ( const [TArray](API\Runtime\Core\Containers\TArray)< FSceneOutlinerTreeItemPtr > & InItems, bool bSelected, [ESelectInfo::Type](API\Runtime\SlateCore\Types\ESelectInfo__Type) SelectInfo )